Clear shader disk cache after glProgramBinary failure.

gpu/command_buffer/service/memory_program_cache.h

Index: gpu/command_buffer/service/memory_program_cache.h
diff --git a/gpu/command_buffer/service/memory_program_cache.h b/gpu/command_buffer/service/memory_program_cache.h
index f4cc2ec4921b885c9b97675c564901b054de988b..4662e911175a90d486f35b2c9d9e691bf5ad4ebd 100644
--- a/gpu/command_buffer/service/memory_program_cache.h
+++ b/gpu/command_buffer/service/memory_program_cache.h
@@ -20,6 +20,8 @@
 
 namespace gpu {
 
+class GpuProcessActivityFlags;
+
 namespace gles2 {
 
 // Program cache that stores binaries completely in-memory
@@ -27,7 +29,8 @@ class GPU_EXPORT MemoryProgramCache : public ProgramCache {
  public:
   MemoryProgramCache(size_t max_cache_size_bytes,
                      bool disable_gpu_shader_disk_cache,
-                     bool disable_program_caching_for_transform_feedback);
+                     bool disable_program_caching_for_transform_feedback,
+                     GpuProcessActivityFlags* activity_flags);
   ~MemoryProgramCache() override;
 
   ProgramLoadResult LoadLinkedProgram(
@@ -168,6 +171,7 @@ class GPU_EXPORT MemoryProgramCache : public ProgramCache {
   const bool disable_program_caching_for_transform_feedback_;
   size_t curr_size_bytes_;
   ProgramMRUCache store_;
+  GpuProcessActivityFlags* activity_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryProgramCache);
 };